15 Mar 2025

Lucky Plaza

Joven Water Heater Replacement: Solving Power Tripping & No Hot Water at Lucky Plaza on 22 Feb 2025

The customer’s Joven 35L (JVA35) water heater had no hot water and occasionally power-tripped. A site assessment revealed the heater had reached its lifespan, and the 3-pin plug socket was burnt, posing a safety hazard. Using a 3-pin plug is non-compliant with Safety Mark regulations, as it can cause overheating or fire hazards. The drain pipe was also discharging water near power points unsafely, risking electrical hazards.

To resolve these issues, we recommend replacing the old heater with a new, compliant unit and directly wiring it to the electrical mains through a double-pole switch for safe operation. Additionally, the drain pipe will be rerouted to discharge water safely near the floor, away from electrical points, and in line with PUB’s guidelines. These measures ensure the system is safe, efficient, and compliant, providing the customer with reliable hot water and peace of mind.

Project location
Lucky Plaza
Property type
Condominium

Before

Replacement of Joven JVA35 Water Heater to resolve heater problems end of service life.

After

Joven JSH50 Water Heater is the new installation. All pipe works connecting to the heaters are stainless steel. Following the manufacturer's specifications, a new approved stop valve and double-check valves are employed. Such will comply with PUB Regulations. Our Licensed Plumber has supervised and approved the installation. There is a 1-year warranty by Homeone for this installation on top of the warranty provided by the manufacturer.

Table of Contents

Joven Water Heater Replacement: Solving Power Tripping & No Hot Water

Existing Heater:

Joven JVA35 (35L)

New Heater:

Joven JSH50 (50L)

Site Assessment Findings:

The existing Joven JVA35 water heater has reached the end of its lifespan.
The socket outlet for the 3-pin plug powering the heater was burnt, posing a safety hazard and non-compliance with Safety Mark regulations.
The drain pipe was suspended in the air, unsafely discharging water near power supply points, risking electrical hazards.
The 3-pin plug setup is unsuitable for the heater’s current draw and should be replaced with a direct wiring system through a double-pole switch.

Proposed Solution:

To address these issues, we recommend replacing the old Joven JVA35 with a new Joven JSH50 (50L) water heater, which better meets the customer’s needs. Additionally, to ensure safety and compliance, we propose installing a 20A junction box for the heater’s power supply, replacing the unsafe 3-pin plug setup.

Replacement Work Scope:

Supply and installation of the new Joven JSH50 water heater.
Removal of the old Joven JVA35 unit.
Installation of a heater switch for safe and compliant power supply.
Installation of a proper drainpipe
Testing and commissioning of the new system.
Clean the work area before departure.
Provision of PUB approval letter.

Regulatory Compliance:

The electric water heater as a whole unit (i.e. parts incorporated in the water heater itself such as heating element, pressure relief valve/temperature relief valve, water tank, etc. shall be tested in accordance with the following:

AS/NZS 4020:2018 Appendix K – Sample extraction procedure for use with water heating system. An accredited or non-accredited test report for Appendix K is acceptable provided that the test laboratory is accredited by Singapore Accreditation Council (SAC) to AS/NZS 4020:2018 Appendix H on Extraction of Metals, at the point of testing;
The samples extracted in accordance with Appendix K shall then be tested in accordance with AS/NZS 4020:2018 Appendix H – Extraction of metals (for metallic materials in contact with water). The maximum allowable concentrations of metals listed in Table 2 of AS/NZS 4020:2018 shall not exceed the limits specified by the World Health Organization (WHO) Guidelines for Drinking Water Quality.

Conclusion:

The primary issues with the existing Joven JVA35 water heater—no hot water and power tripping—were caused by its age and the unsafe 3-pin plug setup. By replacing it with the Joven JSH50, installing a heater switch and drainpipe, we ensure a safe, reliable, and compliant solution that adheres to PUB regulations and Safety Mark standards. This upgrade not only resolves the current issues but also provides enhanced performance and peace of mind for the customer.

Lucky Plaza